Fastener



F. G. NEUBERTH.

FASTENER.

APPLICATION FILED MAY 13, 191B.

m V 3 N F FRANKLIN Gr. NEUBERTH, C 1 ANSONIA,

CONNECTICUT, ASSIGNOR TO THE S. O. & O. 00.,

OF ANSONIA, CONNECTICUT, A CORPORATION OF CONNECTICUT.

FASTENER.

nasaaes'.

Application filed May 13, 1918.

(Z whom it may concern:

drawings indicating like parts in the several figures.

This ll venti .n slates to fastening memhers which are adapted to be applied in operative relation to the opposing faces of sheet material such as cloth, leather, and the like, and whicl, when so applied. are adapt to Q'i') securely the material to which Q1116 llliBlllbifil'S 3T8 SCClll'BCl. A typical example of the type of fastener in which this invention may be embodied 1s fou l in a groinet or eyelet and its coop- I washer. Groinets and washers are tKtJfiSlVQ-ly employed in sails, tents, blankets, anl

similar articles to surround the hole which will be used for a lacing cord or some similar purpose and to prevent the material from fraying or raveling at this point. EX- perience shows tha in any case wherein there is likelihood of lateral strain upon the material, it is very diiiicult to set the fastoners tightly enough to prevent lateral separation of the material from the two members of the fastener. In view of this diiiiculty, various forms of teeth and projections have been provided upon the gromet or the washer.

The general object of the present invention is to provide an improved fastener of this type which will securely bind the material and withstand a considerable lateral strain upon the material. and which may be readily and cheaply manufactured. The illustrated construction and arrangement combines a gromet having preferably a dished flange and a narrow flattened rim with a washer provided with a plurality of prongs, preferably of substantially triangular shape, cut out of the material between the edges of the washer. These prongs are arranged with their bases parallel to one of the peripheries so as to set up the maximum opposition to lateral removal of the work and are located opposite a series of teeth projectingfrom the inner periphery of the washer.

Specification of Letters Patent.

Patented Mar. 16, 1920.

Serial No. 234,219.

The preferred embodiment of the invention, which will be described in thefollo'wiug specification, has been illustrated in the accompanying drawing, in which,

Figure 1 is a perspective view of the two parts of the fastener in separated position;

Fig. 2 is a perspective view showing the fastener in set position upon apiece of material with a portion of the fastener broken away; and

Fig. 3 is a sectional view taken in the plane of the material to which the fastener has been applied;

The illustrated form of fastener will be seen to comprise an eyelet or gromct 1O having a barrel 12 and a dished flange 14, the outer periphery of which provided with a narrow flattened rim 16. Cooperating with this part of the fastener is another part, to wit, a washer 20 which is annular-in and has a narrow flattened rim 22 at its outer periphery. The inner periphery may, if desired, be provided with upstanding teeth 2% which are designed to be rolled over and clenched to a greater or less degree around the inner periphery of the hole in the material 30 when the fastener has been set therein. The washer 20 is furthermore. provided with prongs 26 which are cut out of the material between its edges and are shown .of triangular form with their bases lying along an intermediate circle between the two peripheries. The design of these prongs is preferably such that, when the parts of the fastener have been clenched upon the work, they will pass through the material and come into close engagement with the dished flange 14: of the gromet. Upon an inspection of Figs. 2 and 3, it will be seen that these prongs are located a sub- 7 stantial distance back of the edge of the previously formed hole in the material so that they necessarily pass through the material (see Fig. 3) and are 'disposed with their broad faces in position to counteract any lateral strain tending to pull the material out of the fastener. By reason of the design of the prongs, they are not liable to be bent during the setting operation and yetwill be brought into close engagement with the other element of the fastener so that there is no possibility that the material will slip over the ends thereof when a strain is applied laterally to the material. It will be noted that the narrow flattened rims upon form the outer peripheries of both the gromet and the washer are brought into closely approaching relation so that they tightly grip the material and help to secure the same against lateral strain. Also, among other advantages, by locating the prongs 26 directly opposite the teeth 24: it is possible to get the desired relation between the prongs and the peripheries without excessively weakening the washer itself. In addition to their obvious function of holding the material, the prongs assist the feeding of the washers in a raceway and prevent them from riding over one another.

Having fully described my invention, What I claim as'new and desire to secure by Letters Patent of the United States is:

1. An annular fastener having one periphery provided with a. series of teeth, and additional prongs disposed in radial alinement with said teeth respectively and out out of the material that connects the teeth respectively with the other periphery.

2. An annular fastener provided with an annular dished portion connecting its peripheries and having its inner periphery provided with teeth bent sharply upwardly relative to the plane of the member, and additional prongs struck out from said dished portion, said prongs being substantially triangular in shape and having their bases disposed approximately parallel to an adjacent periphery of the member.

two-part fastener comprising a gromet part having a dished flange portion cooperating washer and a cooperating washer part havin a dished body portion, one of said parts belng provided with prongs struck out of its dished portion, said prongs being constructed and arranged to pass through the material and to be brought closely adjacent to the dished portion of the opposing partsubstantially without any clenching or upsetting of said prongs.

4. A two-part fastener comprising a groinet part formed with a tubular barrel and having a dished flange portion'provided with a narrow flattened rim, and a part comprising an annular dished body portion having a narrow flattened rini teeth projecting from the in ner periphery of the washer part so as to be curled over by the dished flange portion of the gromet part when the parts of the fastener are brought into clenched relation,-

and prongs of triangular form struck up fron'i said body portion so that their bases extend along a circle substantially concentric with and between the peripheries of the washer.

5. An annular fastener one principal edge of which forms one of its peripheries and is provided with teeth extending substantially parallel to the axis of the fastener, the fastener having prongs struck up from the material between the edges, the points of said prongs being struck up from said teeth.

In testimony whereof I have name to this specification.

FRANKLIN G. NEUBERTH.

signed my 

